Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/251

Click to flip

251 Cards in this Set

  • Front
  • Back
What is defined as the complete collective configuration of cabling & associated hardware
Structured Cabling Systems (SCS)
What type of cabling system serves as a wide range of usage to provide access to telephone service or computer networks. and is also defined as ownership
SCS Structured cabling systems.
The SCS begins at the _____________ termination
Service Provider SP
What is also known as the point of demarcation (demarc) or network interface device (NID)
Service Provider
The standardization of cable installs is to ensure acceptable system __________ from complex systems.
Performance
____/________/_________ are responsible organization for providing & maintaining standards & practices
ANSI/TIA/EIA
ANSI/TIA/EIA developed Standards for:
design, install, maintaining cable installs
Standards Provide for: (4items)
Consistency
Conformance
A basis for examining a system
Uniform documentation
What does EF stand for
Entrance Facility
What does ER stand for
Equipment Room
What does HC stand for
Horizontal Cross Connect
What does IC stand for
Intermediate Cross Connect
In an as-built what does a rectangle stand for?
Work area
What does a Structured Cabling system include:
Entrance Facilities
Backbone Pathways
Backbone Cabling
Horizontal Pathways
Horizontal Cabling
Telecommunication outlets / connectors
Equipment Rooms
Telecommunication Rooms
Cross Connect Facilities
Multi User telecom outlet assemblies (MUTOA)
Transition Points
Consolidation points
What includes the cable components to connect outside service facilities to premises cabling. Including
*service entrance pathways
*cables
*connecting hardware
*primary electrical protection devices
*transition hardware
Entrance Facilities
What is responsible for the installation of
*service entrance pathways
*cables
*connecting hardware
*primary electrical protection devices
*transition hardware to a specified point of demarcation
The service provider
This standard falls under ANSI/TIA/EIA 569-a
Entrance Facility Pathways
ANSI/TIA/EIA 569-A is what standard
Commercial Bldg Standard for Telecommunications pathways and spaces
______________is meant to provide:
*Point of demarc between the service provider and the customer cables
*Primary electrical protection devices
*Space to house the transition between the cabling in the outside plant to cabling approved for intra bldg use (involves transition of fire rated cabling)
An entrance facility
The entrance facility includes:
*route these facilities follow (private property)
*Entrance point (EP) to the building
*Twisted pair within the building
and must terminated ____________ the building

A within
B outside
Within
What does EP stand for
Entrance Point
The determination of the entrance facility depends on:
*Type of entry being used
*Route for the facility
*Bldg architecture
*Aesthetic considerations
What does FCC Stand For
Federal Communications Commission
The FCC regulates all ____________
Telecommunications
What year was the FCC created
1934
What does REA stand for
Rural Electrification Administration
What year was REA created
1935
What does REA govern
Telephone service
REA is now known as ____
RUS Rural Utilites Services
February __________, the telecommunications reform act of _____ was signed into law.

(What year)
1996
What does BICSI stand for
Building Industry Consulting Service
What does CREDFACs mean
Conduit, risers, equipment space, ducts, and facilities
What does RCDD mean
Registered Communications Distribution Designer
When was the RCDD created
1984
What does TDMM mean
Telecommunications Distribution Methods Manual
What does CCIA mean
Computer Communications Industry Association
What does EIA mean
Electronic Industries Association
In __________ (year) the CCIA & EIA developed standards for telecommunications cabling
1985
In ______________(YEAR) EIA became TIa
1988
What does TIA stand for?
Telecommunications Industry Association
________/________ is accredited through ANSI
TIA/EIA
What does ANSI mean
American National Standards Institute
What does ISO mean
International Organization for Standardization
What does IEC mean
International electrotechnical commission
The ___/___ oversees the international standardization of telecommunication cabling
ISO/IEC
What does JTC mean
Joint Technical committee
What does DSL mean
Digital subscriber line
_________(s) provide high speed digital services using existing telephone services
DSL's
What does ISDN stand for
Integrated Services Digital Network
What allows both voice and data services
ISDN
What does VoIP stand for
Voice over Internet protocol
The most common medium for providing connections to the SP is _______ cabling
Copper
What are the four principal types of EF's are:
underground
tunnel
buried
aerial
True or False. Having sex with your wife is fun?
True
True or false, Underground entrances use conduit or other tyeps of mechanical pathways to provide out-of-sight service to a bldg
True
The advantages of underground entrances are
They preserve the aesthetic appearance of the building

They are adaptable for future facility placement or removal

They are economical over the life cycle

They provide security of additional physical cable protection

They minimize the need for possible subsequent repairs to the property when growth is required for existing facilities
Having a high initial cabling installation cost
Requireing careful route planning
Providing a possible path for water or gas to enter bldgs
and Taking more time to install are all ___________ of underground conduit entrances

A. Advantages
B. Disadvantages
Disadvantages
_________ entrances are means of providing out-of-sight service to a bldg without conduit.

A. Facility
B. Buried
B. Buried
The trench of buried entrances are usually provided by the building owner True or False
True
The ____________ of buried entrances are that they:
Preserve the aesthetic appearance of the bldg
Usually have a lower initial cabling installation cost than an underground installation.
Can easily bypass obstructions, compared with underground installations.

A. Advantages
B. Disadvantages
A. Advantages
i love you daddy
samantha
____________ Entrances are another means of providing service to a bldg. __________ refers to cables placed overhead.
Aerial
Aerial entrances provide the lowest cabling installation cost and are readily accessible for maintenance. True or False
True
What is the abbv for Galvanized rigid conduit
GRC
True or False Galvanized rigid conduit (GRC) must be temporally and effectively grounded.
False
The term ___________ is used to describe cables that handle the major network traffic.
Backbone cabling
Backbone cabling falls under what ANSI/TIA/EIA standard
568B.1 Commercial Bldg Telecommunications Cabling Standard par 1: General Requirements
What are the two types of backbone cabling
Interbuilding
Interabuilding
True or False Intrabuilding backbone cable is defined as a cable that handles traffic between bldgs.
False
True or False Interabuilding backbone cable is defined as a cable that handles traffic between TRs in a single bldg
True
A __________ backbone is a cable that is installed between a main cross-connect and an intermediate cross-connect or a horizontal cross-connect.

A. First Level
B. Second Level
First Level
A ____________ backbone is a cable that is installed between an IC and an HC.

A. First Level
B. Second Level
B. Second Level
What does MC Mean
Main Cross-Connect
What does FD Mean
Floor Distributor
What does CD mean
Campus Distributor
The IEEE 802.3 standard for baseband Ethernet at 10 Mb/s over 50.0. -,
thin coaxial cable to a maximum distance of 185 m (607 ft).
10BASE-2
The IEEE 802.3 standard for baseband Ethernet at 10 Mb/s over 50.0. coaxial trunk and attachment unit interface twisted-pair cable to a maximum distance of500 m (1640 ft).
10BASE-5
The IEEE 802.3 standard for baseband Ethernet at 10 Mb/s over optical fiber cabling to a maximum distance of 2 km (1.25 mi).
10BASE-F
The IEEE 802.3 standard for baseband Ethernet at 10 Mb/s over twisted-pair cabling to a maximum distance of 100 m (328 ft).
10BASE-T
The IEEE 802.3 standard for broadband Ethernet at 10 Mb/s over 75.0. broadband coaxial cable to a maximum distance of3600 m (2.25 mi).
10BROAD-36
The IEEE standard for baseband Ethernet at 1000 Mb/s (I Gb/s) over four twisted-pairs, using Category 5 (or higher) cabling.
1000BASE-T
The standards and recommended practices for the carrier sense multiple access with collision detection form of network communications. Such LAN s include Ethernet and fast Ethernet.
IEEE 802.3
The standards and recommended practices for the token bus form of network communications. Such LAN s include manufacturing automation protocol
IEEE 802.4.
The standards and recommended practices for the token ring form of network communications. Such LANs include Token-Ring Network.
IEEE 802.5
The development of a hard char that resists the erosion of fire and flames; a characteristic of a firestop when exposed to fire.
ablative
A chemical agent used to cause a chemical reaction for setting permanent bonds on epoxy glues.
accelerator
The half -angle of the cone within which incident light is totally internally reflected by the optical fiber core. The light within this cone is coupled into reflected modes of the optical fiber.
acceptance angle
A facilitating agreement between the contractor and the client that indicates when the project is satisfactorily completed. Typically applies to specifics of how the acceptance testing will be performed and documented. May include other items on which the client's acceptance is dependent (e.g., delivery of as-built drawings, final cleanup at project site ).
acceptance plan
A test or set of tests performed to demonstrate satisfactory completion of a predetermined task or group of tasks on which the client's acceptance is dependent (e.g., certification testing of horizontal cable to current standards).
acceptance test
A system consisting of removable and interchangeable floor panels that are supported on pedestals or stringers (or both) to allow access to the area beneath.
access Door
A voice/data/video channel currently in use.
active circuit
Normative document used to provide additional requirements and recommendations to a published standard. When published, an addendum effectively becomes part of the standard that it supports.
addendum
Telecommunications cable installed on aerial supporting structures such as poles, sides of buildings, and other structures.
aerial cable
Wires and cables installed on poles with the assistance of guys, anchors, and pole attachment hardware.
aerial plant
Compressed air source used to propel a foam ball or other object through conduit for the purpose of attaching a pull string.
air bottle
A swike termination device that is essentially a point receptor for attachment of flashes to the lightning protection system and is listed for the purpose. Typical ~ir terminals are formed of a tube or solid rod. Air terminals are sometimes called lightning rods.
air terminal
A straight section of round rod stock that has threads installed over its entire length. Also known as a threaded rod.
all-threaded-rod (ATR)
A current that changes direction at a uniformly repetitious rate.
alternating current (ac)
A conductor installed from the equipment grounding bus inside the electrical panel to a telecommunications grounding busbar or telecommunications main grounding busbar.
alternating current equipment ground (ACEG)
An organization that provides resources, continuing education, and networking for architects.
American Institute of Architects
ANSI Federation is a private, nonprofit membership organization focused on meeting the standards and conformity assessment requirements of its diverse constituency. It provides a neutral forum for the development of consensus agreements on issues relevant to voluntary standardization. The United States (U.S.) representative to the International Organization for Standardization and, through the U.S. National Committee, to the International Electrotechnical Committee.
American National Standards Institute (ANSI)
A system used to specify wire size. The greater the wire diameter, the smaller the value ( e.g., 24 AWG [0.51 mm (0.020 in)]).
American wire gauge (AWG)
Unit of electric current. One ampere is equal to the current produced by one volt acting through a resistance of one ohm.
ampere (A)
A format that uses variables such as voltage amplitude or frequency variations to transmit information.
analog
A signal that uses continuous physical variables such as voltage amplitude or frequency variations to transmit information. Contrast with digital signal.
analog signal
I. The device to which an item is fastened. 2. In an OSP environment, a device made up ofa single plate or series of flat plates and combined with a rod having a connecting ~ye. When the plates are direct-buried and the rod is exposed, the device becomes a secure point to connect to for stability.
anchor
An optical fiber connector that is polished at an angle of8 to 10 degrees to reduce the back-reflection of the signal. Some high- performance singlemode systems (e.g., high bandwidth analog video systems) require a very low level ofback-reflection ( -55 dB or better) to perform correctly. Many standard connectors, such as the SC, ST, and FC, can be provided in an A PC configuration. ,
annular space The ring outside of the pipe or cable being protected but inside the hole or sleeve.
angle physical connector (A PC)
A liquid crystal polymer material with exceptional tensile strength and coefficient of thermal expansion near that of glass. Widely used as a strength member in optical fiber cables. Also referred to as aramid yarn.
aramid
A strength element used in cable to provide support and additional protection of the fiber bundles.
aramid yarn
Drawings or blueprints that include architectural, mechanical, electrical, and structural designs.
architectural, mechanical, electrical, structural (AMES)
I. Documentation that indicates cable routing, connections, systems, and blueprint attributes upon job completion that reflects changes from the planned to the finished state. 2. A drawing that details how something was built or how field conilitions were found.
as-built
A high-speed switching transmission protocol that utilizes payload packages organized into 53 byte cells to carry data.
asynchronous transfer mode (ATM)
The decrease in magnitude of transmission signal strength between points, expressed as the ratio of output to input. Measured in decibels, usually at a specific frequency for copper or wavelength for optical fiber, the signal strength may be power or voltage.
attenuation
The difference between attenuation and crosstalk measured in dB at a given frequency. This difference is critical to
ensure that the signal sent down the twisted-pair cable is stronger at the receiving end of the cable than any interference signals (crosstalk) from other cable pairs.
attenuation-to-crosstalk ratio (ACR)
Conductors classified larger than one AWG [7.4 mm (0.29 in)] and smaller than conductors classified in circular mils.
aught
The building official, electrical inspector, fire marshal, or other individuals or entities responsible for interpretation and enforcement of local building and electrical codes.
authority having jurisdiction (AHJ)
Automatic ranging by an optical time domain reflectometer.
auto range
A function used by field test instruments to run all the required tests in a sequential manner without operator intervention.
autotest
A panel (e.g., wood or metal) used for mounting connecting hardware and equipment.
backboard
A facility (e.g., pathway, cable, or conductors) between any of the following spaces: telecommunications rooms, common telecommunications rooms, floor serving terminals, entrance facilities, equipment rooms, and common equipment rooms.
backbone
Cable and connecting hardware that provides interconnections between telecommunications rooms, equipment rooms, and entrance facilities. See backbone.
backbone cabling
The portion of the pathway system that pennits the placing of backbone cables between the entrance location and all cross-connect points ~~thin a building and between buildings. ~-
backbone pathway
. The scattering of light into a direction opposite to the original direction.
backscatter
The ratio of backscattered light to transmitted light. The backscatter is a fixed percentage of the transmitted light.
backscatter coefficient
A cable consisting of one or more copper symmetrical cable elements (twisted~pair or quads).
balanced copper cable
A balanced-to-unbalanced circuit coupling device, used to convert from unbalanced to balanced transmission, and provides impedance matching for connecting twisted-pair to coaxial cable.
balun
A range of frequencies, usually the difference between the upper and lower limits of the range, expressed in Hz. It is used to denote the potential capacity of the medium, device, or system. In copper and optical fiber cabling, the bandwidth decreases with increasing length.
bandwidth
A female-to-female adaptor used to join two connectorized segments of coaxial cable together.
barrel connector
Transmission of an analog or digital signal at its original frequency. A method of signal transmission where the entire bandwidth of the - medium is used to send a single signal.
baseband signaling
Horizontal cable of up to 90 m (295 ft) plus up to2 m (6.5 ft) of test equipment configuration cord from the main unit of the tester to the local collection and up to 2 m (6.5 ft) of test equipment cord from the remote connection to the remote unit of the tester. Maximum length is 94 m (308 ft).
basic link test configuration
A measure of signaling speed equal to the number of signal transitions per second, which may be equal to the data rate in b/s.
baud
A bayonet locking connector used with lOBASE-2 thin coaxial cable segments. These connectors, used throughout the cable length, attach to T -connectors, which in turn connect to network devices.
Bayonet Neil-Concelman (BNC)
Device attached to a beam or other building structure above the ceiling to hold cable supports or equipment.
beam clamp
A measure of analog signal strength; named in honor of telephone pioneer Alexander Graham Bell.
bel
Maximum radius that a cable can be bent to avoid physical or electrical damage or cause adverse transmission performance. ~
bend radius
1. For fibers, the bend radius that causes excess attenuation due to light leaking from the core. 2. The smallest permitted bend in a cable; determined by the construction. Influences the design of cable pathways and installation practices.
bending radius
A type of optical fiber connector.
biconic
A telecommunications association, formerly known as Building Industry Consulting Service International.
BICSI@
A list of the quantity and specific types of materials to be utilized on a project. This list should also consider exempt materials (screws, bolts, etc.).
bill of material (BOM)
Digital signals may be described as binary signals. When only two states or conditions are present, they are typically represented as on/off, open/closed, ground/open, high/low, yes/no, positive/negative, etc. When printed out, they are typically expressed as land 0.
binary
A system that determines the true rate of data transfer based on baud and bit rates. The numbers will vary depending on such items as encoding schemes.
binary digital system
A group of wire pairs found in a large cable. Groups can be distinguished from one another by using colored threads. Standard color-coding provides for 25 pairs per binder group.
binder group
A binary digit; the smallest element of information in binary systems. It is either a logical one (I) or zero (0), also known as "an on or an offbit" of binary data.
bit
The ratio of incorrectly transmitted bits to total transmitted bits. A primary specification for all transmission systems, it is usually expressed as a power of 10, The number of errors made in a digital transmission as compared to complete accuracy.
bit error rate (BER)
A unit of measure used to express the data transfer rate. Commonly used rates include kilobit per second (kb/s), megabit per second (Mb/s), and gigabit per second (Gb/s).
bit per second (b/s)
Device used to connect one group of wires to another.
block (connecting)
A reproduction of an architectural plan and/or technical drawing that provides details of a construction project or an existing structure. These drawings are printed on special paper that allows graphics and text to appear as blue on a white background.
blueprint
The permanent joining of metallic parts to form an electrically conductive path that will assure electrical continuity, the capacity to safely conduct any current likely to be imposed, and the ability to limit differences in potentials between the joined parts.
bonding
Interconnects the building's service equipment (power) ground to the telecommunications grounding system.
bonding conductor for telecommunications
A splice in which one cable is spliced to multiple smaller pair-count cables.
branch splice
A metal clip utilized to couple cable conductors on a 66-series connecting block and provide a point of physical disconnection.
bridging clip
A ring that is circular in shape but is open rather than closed. It has a pointed shaft at its apex that is threaded for installation into wood or prethreaded devices.
bridle ring
Commonly used to refer to high-speed high bandwidth digital circuits, where the communications channel is capable of transporting the data streams simultaneously generated by many devices
broadband
A protective thermoplatic material that is applied to the acrylate layer of the optical fiber to protect against environmental hazards. May be more than one layer. See coating
buffer coating
Loose- fitting cover over the optical fibers in loose-tube construction, used for protection and isolation.
buffer tube
A device or devices used to terminate cables entering or -.leaving buildings)t provides housing for the voltage and current modules protecting the cable pairs from lightning and foreign voltage.
building entrance protector
A network of grounded building components ( e.g., metal underground water piping, metal building frame, concrete-encased electrode, aground ring and rod, pipe electrodes).
building grounding electrode system
A large manila, hemp, or double-woven Dacron@ rope used for pulling high pair-count backbone cable.
bull line
Large wheel used to maintain an arc when feeding large cables into a backbone pathway.
bullwheel
1. Many individual optical fibers contained within a single jacket or buffer tube. Also, a group of buffered optical fibers distinguished in some fashion from another group in the same cable core. 2. Also used to indicate time and common handling of multiple cables routed together.
bundle
I. Many optical fibers contained : within a single jacket or buffer
tube. 2. A group of buffered optical fibers distinguished in some fashion from another group in the same manner.
bundled fiber
A cable installed under the surface of the ground (not in conduit) in such a manner that it cannot be removed without disturbing the soil.
buried cable
The time required for electronic circuits to become warm after they are turned on without being put in service.
burn-in
A linear configuration where all network devices are placed on a single length of cable. It requires one backbone cable to which all network devices are connected (e.g., Ethernet lOBASE-2 and lOBASE-5).
bus topology
A splice in which cables enter the same endcap of the splice closure.
butt splice
I. Housings used for storing splice closures and terminals in asp. 2. An
enclosed container used for mounting a wide variety of miscellaneous equipment
inside ( e.g., fans, power strips, connection devices, terminations, apparatus, cables, wires, equipment, etc.). They are available in a wide variety of sizes for either wall-mounting or self supporting.
cabinet
A cable that has connectors installed on one or both ends. See jumper and pigtail.
cable brake A mechanical restraining device that controls the payout of cable from a reel. '.
cable assembly
Set of numbered S-pin modular plugs that can be identified by the cable tester (sometimes referred to as an office locator kit).
cable-end locator kit
The end of the cable attached to the pulling device.
cable head
I. Scheme adapted for labeling cables to identify them based on ANSI/TIAIEIA-606, Administration Standard for the
Telecommunications Infrastructure of Commercial Buildings. 2. The scheme employed when identifying cable or its associated hardware.
cable labeling system
Spool that cable is wrapped around. cable reel brake See reel brake.
cable reel
A length of installed media in between connection points, which may include permanent splices.
Cable run
A covering over the optical fiber or conductor assembly that may include one or more metallic members, strength members, or jackets.
cable sheath
A combination of conduits, cable trays, support hooks, tie wraps, and any other hardware pieces used in a cabling installation to support cables. Cable support systems keep excess stress off the cables and may provide some mechanical protection to the cables being supported.
cable support system
1. Item used for attaching the pairs of a cable to allow for connecting the cable to other cables or devices. Examples of cable termination hardware are: patch panels, connecting blocks, patch blocks 66M-, 110- or BIX- type, and modular jacks. 2. The connection of the wire or optical fiber to a device ( e.g., equipment, panels, or a wall outlet).
cable termination
A support mechanism used to route and support telecommunications cable or power cable. Typically equipped with sides that allow cables to be placed within the sides over its entire length.
cable tray (CT)
Vertical rack with multiple arms for holding small reels of cable.
cable tree
Task of verifying test equipment against a reference to ensure proper operation.
calibration
The buildings and grounds of a complex, such as a college, university, industrial park, or military base having legal contiguous interconnection.
campus
The tendency of an electronic component to store electrical energy. Pairs of wire in a cable tend to act as a capacitor. The charge on one of two conductors of a capacitor divided by the potential difference between them (measured in4arads).
capacitance
A device for pulling cable.
capstan
A brush used for scuffing ( abrading) the surface of a cable sheath. category Describes mechanical properties and transmission characteristics of
twisted-pair cables and screened twisted-pair cables and assigns a unique number classification (e.g., Category 3, Category 4, Category 5, and Category 5e).
carding brush
100-ohm twisted-pair copper cable that meets or exceeds specifications in ANSI/nA/EIA-568-A, Commercial Building Telecommunications Cabling Standard, and ISO/IEC 11801, Generic Cabling for Customer Premises, for transmissions up to 16 MHz.


What Cateogry Am I?
Category 3
100-ohm twisted-pair copper cable that meets or exceeds specifications in ANSI/TIA/EIA-568-A, Commercial Building
Telecommunications Cabling Standard, and ISO/IEC 11801, Generic Cabling for customer Premises, for transmissions up to 20 MHz.

What Category Am I?
Category 4
100-ohm twisted-pair copper cable that meets or exceeds specifications in ANSI/TIA/EIA-568-A, Commercial Building
Telecommunications Cabling Standard, and ISO/IEC 11801, Generic Cabling for Customer Premises, for transmissions up to 100 MHz.

What Category Am I?
Category 5
100-ohm twisted-pair copper cable that meets or exceeds
specifications for transmissions up to 100 MHz in ANSI/TIA/EIA-568-B.1 ,
Commercial Building Telecommunications Cabling Standard, Part 1, General Requirements, and ISO/IEC 11801, Generic Cabling for Customer Premises .

What Category Am I?
Category 5e
100-ohm twisted-pair copper cable that meets or exceeds
specifications for transmissions up to 250 MHz in ANSI/TIA/EIA 568-B.2,
Transmission Performance Specifications for 4-Pair 100 .0 Category 6
Cabling, and ISO/IEC 11801, Generic Cabling for Customer Premises. ~

What Category Am I?
Category 6
100-ohm twisted-pair copper cable that meets or exceeds
specifications for transmissions up to 600 MHz to be published as IEC 61076- 3-104, Connectors with Assessed Quality for Use in dc, Low Frequency Analog, and in Digital High-Speed Applications.

What Category Am I?
Category 7
Material that is mixed with water. Similar in appearance to
lightweight concrete or mortar, it can be troweled to a smooth finish.
cementitious
A place where an access provider terminates customer lines and the switching equipment that interconnects lines.
central office (CO)
Cable test set designed specifically to measure the electrical properties of wire to determine whether the wire meets certification standards.
certification test set
I. The end-to-end transmission between two points to which application- specific equipment is connected including the patch cords at the device location
and at the telecommunications room. 2. ANSI/TIA/EIA-B.l defines a channel as up to 90 m (295 ft) of horizontal cable with connectors (work area and
telecommunications room), plus up to 10 m (33 ft) of patch cords and equipment cords.
channel
A metallic U-shaped bar with spaced holes often hung in a trapeze configuration for support of pathway systems, such as conduits and trays.
channel stock
An impedance of a circuit that, when connected to the ~ output terminals of a uniform transmission line of arbitrary length, causes the line to appear infinitely long. An impedance value calculated by applying a smoothing function (typically a least squares curve fit) to measured input impedance.
characteristic impedance
A conduit insert within an end connector, or a plastic ring that is threaded onto the sharp ends of a conduit ( or fitting) that reduces cable sheath damage during pulling operations.
Chase nipple
One of the effects that limits the transmission properties of optical fiber strands by producing pulse spreading.
chromatic dispersion
The transparent outer concentric glass layer that surrounds the optical fiber core and has a lower index of refraction than the core. It provides total internal reflection and protects against scattering from contaminants at the core surface.
cladding
An ISO/IEC proposed standard for transmission performance measured up to 250 MHz. This standard harmonizes with the proposed Category 6 cabling performance.

What Class Standard Am I?
Class E standard
An ISO/IEC proposed standard for transmission performance measured up to 600 MHz. This standard harmonizes with the proposed Category 7 cabling performance.

What Class Standard Am I?
Class F standard
The process of breaking an optical fiber by a controlled fracture of the glass to obtain an optical fiber end that is flat, smooth, and perpendicular to the optical fiber axis.
cleave
A device that square-cuts the ends of optical fibers.
cleaver
A knot consisting of two half-hitches made in opposite directions, forming a nonslip loop.
clove hitch
Also known as a bus star topology. It is like a tree topology, except that there are clusters of devices at the end of each branch.
clustered star
A material put on an optical fiber during the drawing process to protect it from the environment. See buffer coating.
coating
An unbalanced cable consisting of a central metallic core surrounded by a layer of insulating material. This insulating (dielectric ) material may be a solid material or air spaced. The entire assembly is covered with a metallic mesh or solid metallic sleeve and may be protected by an outer layer of nonconducting material (cable jacket).
coaxial cable
A systematic collection of regulations and rules intended to ensure safety during installation and use of materials, components, fixtures, systems, premises, and related subjects. Codes are typically invoked and enforced through government regulation.
code
This coefficient is used when determining the need for conduit/tubing expansion fittings as related to exposure to extreme temperatures.
coefficient of expansion
Made up of disparate or separate parts ( e.g., copper and optical fiber
cables ).
composite
The ease with which electrical current flows through a Substance. Uniformly distributed along the substance length, conductance varies as a function of a conductor's geometry as well as dielectric properties of the materials surrounding the conductor.
conductance (G)
A rigid or flexible metallic or nonmetallic raceway of circular cross-section through which cables can be pulled.
conduit
A bend in a section of conduit, usually at a specified radius and degree of turn.
conduit elbow
Multiple sections of conduit.
conduit run
A device placed in a conduit to assist in directing cable into a conduit during pulling operations. This device helps to prevent cable sheath damage.
conduit shoe
A short section of conduit that is installed from a receptacle box, usually in a wall, through a suspended ceiling space a short distance to an adjacent hallway.
conduit stub-out
A short section of conduit that is installed from a receptacle box,
usually in a wall, to a suspended ceiling space immediately above the receptacle
conduit stub-up
Safety marker that is used to designate a secure off-limits area for nonworkers.
cone
A mechanical device used to provide a means for aligning, attaching, and achieving continuity between conductors or optical fibers.
connector
The attenuation associated with the physical attachment of two connectors.
connector insertion
A location for interconnection between horizontal cables extending from building pathways and horizontal cables extending into furniture pathways.
consolidation point (CP)
Creates and maintains a construction specifications book that is used by the American Institute of Architects.
Construction Specifications Institute (CSI)
A test that validates whether a material can conduct sound, current, light, or heat without significant interruption or degradation.
continuity test
A constant noise signal.
continuous noise
A person or company contracted to perform a specific task.
contractor
The central, light-carrying part of an optical fiber through which light pulses are transmitted.
core
Turns in a cable path.
corners
A bonding conductor placed (e.g., strapped) on the outside surface of telecommunications cable; used to reduce transient noise.
coupled bonding conductor (CBC)
A device for connecting two other devices, such as connectorized cables, together.
coupler
A device that is used to connect two sections of conduit together. crimp The act of clamping connectors to a cable.
coupling
A section of a splicing rig that fits over an assembled modular connector on the splicing head to provide the crimping of the module.
crimp head
A facility enabling the termination of cable elements and their interconnection or cross-connection.
cross-connect
Error condition in twisted-pair wiring where pairs are reversed.
crossed pairs
The unwanted reception of electromagnetic signals on a communications circuit from another circuit.
crosstalk
When the thread patterns of a nut and bolt do not match, a stripping ( cross threading) of the thread pattern can occur during installation.
cross threading
A chemical process expected over time
curing
Flow of electrons in a conductor measured in amperes.
current
An individual or company that has employed contractors to install their telecommunications system( s ).
customer
The process of switching from old network components to new network components. This term is used when describing the switch of apiece of equipment ( e.g., a computer terminal or telephone) from an existing channel to a newly installed channel. See flash cut and hot cut.
cutover
1. A listing of cable pair assignments used to specify desired circuit connections in a splice or cross-connect. This listing can also serve as the as-built of a splice or cross-connect field. 2. Cable documentation that shows the existing cable plant, the new cable plant, and the cross-connects that will be relocated during cutover.
cutsheet
The practice of wiring devices in series.
daisy-chained
Fiber that is not in use and has no light transmitted. Excess fiber installed in anticipation of system expansion; mayor may not be terminated.
dark fiber
An interconnected system of computers, peripherals, and software over which commands, files, and messages are sent and received.
data network
Also known as a D-subminiature connector. There is a D-shaped metal skirt surrounding the connector's pins/sockets. This connector is widely used for connections between data equipment and is available in a variety of configurations (e.g., DBI5, DB25).
DB## connector
Decibel referenced to one milliwatt (mW); 0 dBm is equal to I mW; 20 dBm is equal to 100 m W.
dBm
A space on a fiber trace following a Fresnel reflection in which no measurement can be made.
dead zone
A logarithmic unit used for expressing the loss or gain of signal II strength. Three dB are the amount by which the pressure of a pure sine wave of ~ sound must be varied in order for the change to be detected by the average human ear.
decibel ( dB)
The difference m propagatlon delay between any two pairs within the same cable sheath.
delay skew
A point where the operational control or ownership changes. This point is usually where the access provider's facilities stop and the customer-owned structured cabling begins.
demarcation point (DP)
Plan that identifies with words and graphics a goal or set of goals. F or example, a design specification might identify the installation of a
system that is to transport information from one point to another using cables, connecting hardware, and associated electronics. It usually includes specific performance and design parameters that the customer desires.
design specification
Colored label placed on terminal blocks and used for identification ( e.g., circuits).
designation strip
1. An optoelectronic transducer that converts optical power to electrical
current. 2. In optical fiber, usually a photodiode.
detector
A steel block or plate with small conical holes through which wire is drawn.
die